Bump verison to release.

Keep up with maintaining 1.0bX duplicates of 0.99-series

Hi 0.99999!

Also release 0.9999 as 1.0b5 to keep --pre happy.

Hi 0.9999, at last!

Drop -dev from version number for release

Push this as 0.99, after PEP 440 pushed pip to ignore pre-releases.

There are no significant changes in this compared with 1.0b3 (the
only changes are documentation/testsuite related).

Add changelog for 1.0b3 (uh, this ought to be have done before).

Add fantasai, Marc, and Mike as contributors, and note the order.

Clarify variable names in test_parser.py.